Process of making tire-casings.



H. HENN|G.

PROCESS OF MAKING TIRE CASINGS. APPLICATION FILED mm. 1915.

Patented Feb. 1, 1916.

2 .75 5 C 1 Immm A i755 2755 W/ 7/VE65E5, v I/Y VE/Vf'oi UNITED STATES PATENT OFFICE.

' .HI TGO HENNIG, OF AKRON, OHIO, ASSIGNOR OF ONE-HALF TO ADELBERT HAUSCI-IILD,

- OF EAST PALESTINE, OHIO.

17 '0 all whom it may concern:

Be it known that I, HUGO HENNIG, a subject of the Emperor of Germany, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Processes of Makingdistinctive and striking appearance, attraca j tive in itself and presenting great advertising value.

In performing my process I take a strip of uncured rubber, designed to form the body of the tread, and punch holes through it. From different'stock of partially cured rubber (preferably softer and of a different color) I punch holes with the same punch and die. I then take the parts punched out in the last mentioned operation, soften their edges with a suitable rubber solvent, and insert them into the openings in the tread strip. When the composite tread thus described is in place inthe tire casing, the whole casing is vulcanized and the inserts firmly adhere to the body of the tread.

The drawing shows my completed tire casing and also the casing in its various steps of completion.

Figure 1 is a side elevation of the completed tire casing; Fig. 2 is a plan thereof; Fig. 3 is a plan of the tread strip after it has been punched and before the inserts have been put in place; Fig. 4 is a cross section of a suitable punch and die showing the tread strip between them; Fig. 5 1s an edge view and Fig. 6 is a plan of the lnlay member.

As shown in Fig. 1, A indicates any usual body for a tire casing, and B indicates the rubber tread strip. C indicates the inlays in the tread strip which, in this instance,

are shown as star-shaped. By making these inlays, of whatever partlcular shape they Specification of LettersPatent.

'. rnocE'ss or MAKING: mmn-casmes.

Patented Feb. '1, 1916.

' Application filed April 8, 1915. Serial No. 19,930.

take, of a different color from the rest of the tread, they present a very distinctive appearance; by being of softer rubber than the rest of the tread, the inlays give inwardly in use and thus carry grit, which gives a non-skidding characteristic to the tire,

Figs. 3 and 4 show at B before it is applied. This strip is made of the usual shape and size for a tread strip [die are, of'course, of the shape desired for the tread strip the inlay. The view shows three of these 3 projections star-shaped and in a diagonal" row. The openings (.1 of the cooperating die have a similar shape and position and are only enough larger than the punches to allow convenient operation. The strip B of sufficient length to extend around the tire, and of the proper width to reach from one side of the tire to the other, may be in serted between these dies, and a diagonal row of openings punched through it, then the strip moved longitudinally, a second set of openings punched, and so on,.until holes have been punched through the length of the strip.

just described being that, in this case, I preserve the punched-out portions, whereas, in the former, the stencil is preserved. I

With the same punch and die and from suitable stock having approximately the .thickness of the strip B I-punch the members C which are to constitute the inlays, the difference between this and the operation now take the punched out portions, show as the stars C, and immerse them in a sui able rubber solvent, preferably benzole. Then these inlays are picked/out, one at a time, from the solventa convenient method being by means of a pin stuck into themand are inserted into the openings 12 in' the tread member. The solvent softens the edges of the inlays so that they may readily.

be slid by hand into the openings of the tread or stencil member. 'fter they are inserted and the strip, with the in1ays;-is in place on the usual tire carcass, the whole tion different from the tread strip, the outer faces of such inlays being flush with the tread surface, securing the tread in place on a tire'carcass, and vulcanizing the casing thus produced.

2. The method of making tire casings consisting of punching through the tread strip a series of holes, punching holes of the same size through rubber stock of other composition, inserting the punched out portions of the last mentioned stock in the openings provided in the strip, mounting the tread on a carcass, and vulcanizlng the caslng thus produced.

3. The process of making tire casings consisting of making openings in a tread strip and inserting in these openings rubber pieces softer than the tread strip and having imits their outer faces flush with that of the tread, and securing such compound tread in place on a tire carcass.

4. The process of making tire casings consisting of making openings in a member to constitute a tread strip, making inlay members of a different composition of rubber and of a size corresponding to the openings, softening the edge walls of one of these members by a rubber solvent, inserting the inlay members into the strip member, and mounting the tread on a tire carcass.

5. The process of making tire casings consisting of making a stencil for a tread strip, making inlays of a difi'erent composition from the tread strip, said inlays being adapted to fit the openings in the stencil,

immersing the inlays in rubber solvent,

thereafter inserting them in the stencil openings, and thereafter vulcanizing the inlaid stripin place on a tire carcass.

In testimony whereof, I hereunto afliX my signature in. the presence of two witnesses. HUGO HENNTG. Witnesses:

W. E. SNYDER, ADELBERT HAUsomLD. 

